No Deed Too Small
Abu Dharr (radi Allahu anhu) reported that The Prophet (sal Allahu alaihi wa sallam) said, “Do not belittle any good deed, even meeting your (Muslim) brother with a cheerful face.”
We learn from this Hadith that meeting somebody cheerfully is also a virtue for two reasons. Firstly, it is a sign of good manners. Secondly, it creates affection and friendship among the Muslims which is a meritorious act.
And Allah Knows Best!